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Division 2

In Division 2, the world of metrology rotates around the "electrical triangle" of volt, ohm and ampere - from high-frequency and energy measuring technology to quantum electronics.


Electrical quantities are ubiquitous in metrology. The Electricity Division is charged with the realization and dissemination of the electrical and magnetic units. To this end, the Electricity Division develops precision electromagnetic measurements, which are based on electrical quantum metrology and quantum standards nowadays. Nanotechnology is employed and advanced for the in-house fabrication of superconductor and semiconductor quantum standards. Fundamental studies of quantum effects in condensed matter lay the groundwork for the electrical metrology of the future.

The Electricity Division offers various calibration services (see Calibration and Measurement Capabilities) and advises governmental authorities, standardization organizations, and industry on electrical measurements. Knowledge transfer programs support innovation and economic growth.


The definition of the ampere, the unit of electric current, in the just revised International System of Units (SI) is based on a fixed value for the elementary charge e. The Joint Research Project (JRP) “e-SI-Amp: quantum realisation of the SI ampere” was launched in the frame of the European metrology research programme EMPIR to develop ways for generating and disseminating electrical current...

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Am 13. Mai 2019 fand in Ljubljana (Slowenien) der Start des durch EURAMET ins Leben gerufenen Europäischen Metrologienetzwerks „Smart Electricity Grids“ (EMN SEG) statt. Die PTB beteiligt sich an der operativen Arbeit und ist auch in den Leitungsgremien des Netzwerks vertreten. Kernziele des Netzwerks sind eine wirksamere Ermittlung des tatsächlichen metrologischen Forschungsbedarfs in der...

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Quantum dots are used in semiconductor quantum technology. They allow to localize and control single electrons in semiconductor devices. Many applications require a fast initialization of a certain quantum state of the electrons. For this purpose, a new technique based on control of tunnelling rates has been developed at PTB.

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